Stapling-machine.



l. PAGLIARUL.

STAPLING MACHINE.

APPLlCATlON FILED .IUNE 30,1915- latented Jan. 16, 1917.

QNX x UNITE STA 'PATENT lflE.

JOSEPH PAGLIARUL, OF CHICAGO, ILLINOIS, ASSIGNOR T JOSEPH E. SMYTH, OF CHICAGO, ILLINOIS.

STAPLING-MACHINE.

Application filed J'une 30, 1915.

TQ all whom t may concern.-

Be it known that I, JOSEPH PAGLIARUL, aI citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new 'and useful Improvements in Stapling-Machines, of which the following is a specification.

My invention relates to improvements 1n stapling machines, and refers more particularly to means for positioning and holding the wire before the staple is formed.

Among the salient objects of the invention are, to provide an improved construction for guiding the wire into its proper position relative to the forming dies; to provlde an improved construction for holding the wire length in the proper position for forming so that the wire length does not tend to be displaced; and, in general, to provide an improved wire stapling construction of the character referred to. I

In the drawin s-Figure 1 is a fragmen tary elevation o an approved type of wire stapling machine to which my invention is applied, the face plate having been removed to expose the mechanism; fig. 2 is a section taken on the line 2-2 of Fig. 1, but showing the face plate and associated mechanism in position; Fig. 3 is a section taken on the line 3 3 of Fig. 2; Fig. 4c is a section taken on the line --t of Fig'. l; and Fig. 5 is a section taken on the line 5--5 of Fig. 1.

Referring to thedrawings, is the head plate of the machine to which is attached by means of suitable screws 11 the slide-box 12 suitably grooved out vertically to receive the former 13. rlhe latter is also grooved out, as shown at 1t, in order to admit the vertically sliding plunger 15. Directly beneath the lower end of the plunger 15 is the forming anvilV 16, the latter having a circular stem 17 adapted to slide in a housing 18 set in the back of the face plate 10 and normally forced outwardly into the position shown in Fig. 2 by means of a spring 19which engages the rear end of said stem 17. Turning of the forming anvil 16 in its housing is pre-l vented by means of a pin 20 extending diametrically through a slot 21 in said stem, said pin also engaging the rear end of said slot to prevent said anvil from flying out of its housing under the influence of the spring 19. The machine is equipped with the usual main shaft 22 and cam disk 23, which latter is provided with a cam groove 24 for oper- Specication of Letters Patent.

Patented Jan. 16, 191'?.

Serial No. 37,150.

ating the former, a pitman 25 for operating.

the plunger 15, and a circumferential cam 26 which coperates with a roll 27 on the upper end of the sliding plate 28 for operating the wire-severing device. As shown in Fig. 2, the machine also has the customary swinging staple support 29 pivoted on the lower end of the slide 30, said parts being carried by the face plate 3l.

The wire-cutting-ofi'l device, which is shown in Figs. 1 and 3, includes a bushing 32 through which the wire is urged intermittently by the wire-feeding mechanism, not shown, and a circular shear blade 33 carried at the side of a vertically reciprocatory plunger 34, the upper end of which is notched to engage the bent-out lower end 35 of the member 28.

So far, I have described an ordinary well known type of machine which I am aware is old, and hence do not claim. The operation of the above-'described parts is well known. As the shaft 22 rotates, the continuous wire, which is intermittently fed through the bushing 32 by means not shown, is cut off whenever the cam 26 strikes the roll 27 and forces the shear blade 33 down upon the wire projecting from the end of said bushing 32. After a staple blank of the proper length has been cut by the shear blade 32. and stationary die 33, it must be formed by the forked end of the former 13 which engages the ends of the staple blank projecting out of the slot 36 at each side of the anvil member 16, and causes the blank to assume the desired U-shape. After the staple has been shaped by the former 13, the plunger 15 descends by virtue of the pitman and after having forced back the anvil 16, the upper side 37 beveled for that purpose, engages the upper limb of the staple and forces the latter through the book or other object which is being stapled together. While the staple is entering the book, the swinging support 29 coperates with the other parts in the usual manner to maintain the shape of the staple.

Considerable difficulty has been experienced on account of the fact that in some cases the wire has an initial curvature which the straightening devices do not always completely correct; or`certain parts of the wire may be more curved than others; in which case, it being impossible to be continually adjusting the straightening device, the end of the wire which is urged through the bushing 32 and into the slot 36 of the forming j inner end of said slot 36 as it is urged forward by the wire-feeding mechanism, but great trouble is caused when the end of the wire has a curvature which tends to make it spring away from the root of the slot. When this occurs, it is found that unless the wire is in the right position to enter an internal groove 39 in the lower end 'of the former 13 when the staple is formed in a U-shape, the outer limb of the staple will be cut off, resulting in damage and `loss of time. To overcome this diliculty, I construct at the side of the anvil 16, remote from the wire-severing devices, an inclined abutment 40 which is conveniently obtained by screwing onto the inner face of the face plate 31 a small rectangular vsteel plate 41, the inner edge of which is beveled to furnish said sloping abutment 40. If the end of the wire tends to spring away from the root of the groove 36, it strikes the inclined surface 40 and is at once deflected and caused to follow a straight path and occupy the proper position to be engaged by the lower end of the former. On account of the abutment 40 occupying space which would otherwise be necessary to permit the former to descend, I bevel off the corner of the fork of the former, as shown at 42. I have found that this construction absolutely prevents the malformation or improper cutting off of the limbs of the staples.

A considerable amount of trouble has also been experienced on account of the fact that the former 13 and the cutting-off device for the wire must be synchronized with great accuracy in the stapling machines which have hitherto been called' to my attention. This is due to the fact that the staple blank is engaged and held by the descending ends of the former before the staple blank is severed from the end of the continuous wire supply. On account of the fact that the former is urged downwardly at comparatively high speed, it is an extremely difficult matter to make a proper adjustment of this character which will be permanent and which will at all times engage the Wire early enough and at the same time not commence to bend it before the blank is severed. I obviate these difliculties by means of the device illustrated in detail in Figs. 4 and 5. In the side 43 of the lower end ofthe plunger I drilll an upwardly extending cylindrical hole 44 in which slides a presser pin maintains it in its proper angular position.

The pin 45 is forced outwardly from the lower end of said fork 43 by means of a small coil compression spring 48 engaging its rear end and located in the back end of said cylindrical aperture 44. The bottom end of said pin 45 is also notched out, as shown at 49, in order to engage the wire as it descends.

The small device just described is an absolute cure for the trouble referred to. In practice, I select a weight of .spring 44 which, when the plunger descends, is just suiiicient to cause the pin 45 to engage the wire with enough pressure to hold the same properly in position in the slot of the anvil, and at the same time not strong enough to bend the Wire. With this arrangement it is unnecessary to make an extremely iine adjustment of the cutting-off plunger and staple-former. All that is necessary is to soy synchronize the reciprocations of the staple-former and the cutting-ofi plunger that the pin 45 engages the wire before the plunger cuts off the staple blank, care of course being taken that the pin 45 is long enough to prevent the rigid ends of the formerffrom striking the staple blank before it is severed.

It should be understood that the details of the construction shown may be modified somewhat Without sacrificing the advantages or benefits to be derived from the use of the invention, hence I do not wish to be limited, except as specified in the appended claims.

I claiml. In a staplingmachine, the combination of a device for severing a staple length from a continuous wire supply, a forming anvil having an outwardly extending open slot to admit the wire-blank and discharge the formed staple, a forming plunger having a pair of forks spaced apart to receive the anvil, and a stationary abutment on the side of the anvil remote from the severing device, having a surface inclined in a direction transverse to the line of feed of the wire for guiding the free end of the wire-staple into the operating field of said plunger.

2. In a stapling machine, the combination of a device for severing a staple length from a continuous wire supply, a forming anvil having an outwardly extending open slot to admit the wire-blank and discharge the formed sta le, a forming plunger having a pair of for s spaced apart to receive the anvil, and a stationary abutment on the side`of the anvil remote from the severing device, having a surface inclined in a direction transverse to the line of feed of the wire for guiding the free end of the wire-staple into the vertical plane necessary for the correct formation of the staple by the forming devices, said forming plunger having one of its forks beveled off to avoid the abutment upon its downward forming stroke.

3. In a wire-stapling machine, the combination of a reciprocatory shear for severing the staple length from a continuous wire supply, a spring-pressed forming anvil having an outwardly extending open slot to admit the wire length and discharge the formed staple, a forming plunger adapted to reciprocate to straddle said anvil and shape the blank into staple form, and a resilient depending presser-member onv the lower end of said fork to resiliently engage the blank before it is severed.

4. In a wire-stapling machine, they combination of a reciprocatory shear for severing the staple length from a continuous wire supply, a spring-pressed forming anvil having an outwardly extending open slot to admit the wire length and discharge the formed staple, a forming plunger adapted to reciprocate to straddle said anvil and shape the blank into staple form, and a downwardly projecting spring-pressed insert in the lower end of said former adapted to engage and resiliently press the unsevered staple blank down upon the anvil before the shear severs the blank from the continuous wire supply and before the lower end of said former bends the blank.

5. In a stapling machine, the combination of a reciprocatory shear, a forming anvil, a former having a pair of lower extensions adapted to reciprocate and straddle the anvil to form a wire blank into suitable form, one of said lower extensions being drilled out from its lower end, a notched pin located in said drilled hole and having its outer end extending below the lower end of said former, resilient means tending to force out said pin, and means for limiting the outward movement of said pin and maintaining the latter with its notch in alinement with the direction of wire feed, said pin being suitably arranged to resiliently engage and press down the blank into Contact with the anvil before severing takes place.

JOSEPH PAGLIARUL. lVitnesses C. A. SoANs, E. G. INGERsoLL. 

